1156455564 has 72 divisors (see below), whose sum is σ = 2973003264. Its totient is φ = 349615200.

The previous prime is 1156455557. The next prime is 1156455569. The reversal of 1156455564 is 4655546511.

It is not an unprimeable number, because it can be changed into a prime (1156455569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 938829 + ... + 940059.

It is an arithmetic number, because the mean of its divisors is an integer number (41291712).

Almost surely, 2^1156455564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156455564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486501632).

1156455564 is an abundant number, since it is smaller than the sum of its proper divisors (1816547700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156455564 is a wasteful number, since it uses less digits than its factorization.

1156455564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907 (or 1894 counting only the distinct ones).

The product of its digits is 360000, while the sum is 42.

The square root of 1156455564 is about 34006.6988106755. The cubic root of 1156455564 is about 1049.6463098986.

The spelling of 1156455564 in words is "one billion, one hundred fifty-six million, four hundred fifty-five thousand, five hundred sixty-four".